Adjustable chair



(No Model.) 5 Sheets-Sheet 1. E. PYNGI-ION.

ADJUSTABLE CHAIR. No. 443,197. Patented Dec. 23-, 1890.

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BPYNGHON. ADJUSTABLE CHAIR. No 443,197, Patented Dec. 23, 1890-.

Patented Dec. 23, 1890.

(No Model.) H 5 Sheets-Sheet 4. E PYNOHON ADJUSTABLE CHAIR.

No. 443,197. Patented Dee.23,1890u.

(No Model.) 5 Sheets-Sheet 5.

E.PYNCHON. ADJUSTABLE CHAIR.

No. 443,197. Patented Dec. 23, 1890.

UNITED I STATES PATENT OFFICE.

EDIVIN PYNOI-ION, OF CHICAGO, ILLINOIS.

ADJUSTABLE CHAIR.

SPECIFICATION forming part of Letters Patent No. 443,197, dated December 23, 18901.

Application filed May 2'7, 1886- Serial No. 203,468. (Nomodeh) To all whom it may concern:

Be it known that I, EDWIN PYNCHON,acitizen of the United States, residing at Chicago,

in the county of Cook and State of Illinois, have invented anew and usefullmprovement in Adjustable Chairs, of which the following is a specification.

My invention relates to adjustable chairs, particularly such as are used by physicians.

The object of my invention is to provide a chair which shall have an adjustable seat, seat front and back, and a swinging seat front and back. I accomplish this object by the mechanism illustrated in the accompanying drawings, wherein Figure 1 is a side view of my chair in its ordinary position. Fig. 2 is the same with seat and seat-frame elevated. Fig. 3 is a vertical section taken through the line X X of Fig. 2, looking rearward. Fig. i is a plain section taken through lineYYof Fig. 2, looking downward. Fig. 5 is a detail of the backlocking device. Fig. 6 is a detail of the tilting-frame-locking device. Fig. 7 is a side view of the chair with back reclining, seatframe elevated, and stirrups attached. Fig. 8 is a detail of a slightly-modified step. Fig. 9 is a section on a vertical longitudinal section through the middle of the chair. Fig. 10 is a detail view. I

Like parts are indicated by the same letter in all the figures.

I first describe the side supports of the chair and parts which support the swinging chair.

A A are irregular arch-shaped pieces, which form the sides of the chair-frame.

A A and A A are respectively cross and longitudinal pieces of the frame.

A A are pivots on the arch; A' A pivots on the tilting frame, and A A hangers which pivotally join the arch and tilting frame. The central hanger is vertical in its ordinary position and the others are at an angle of about forty-five degrees thereto.

B is the side bar of the tilting frame, suspended by the hangers and having the downwardly-projecting locking-bar B rigid therewith.

B B are holes in the bar. I now describe the device for elevating the chair on the tilting frame.

3* B are pivots, which secure the ends of the bars B B to the inner side bar 13 of the tilting frame. 3 are similar bars pivoted at B B to the sliding bar B which is placed so as to longitudinally reciprocate in the groove or recess B of the bar The bars B B and the bars B B are pivoted to the side bar 0 of the seat-frame, as at B B.

D is the sliding frame, composed of the bars D D and D the latter being provided with a screw-hole to receive the screw D which is provided with the crank D The screw is journaled in the box on the rear edge of the box B and the box D on the cross-bar B The'sliding frame is secured to the sliding bars B B so that by turning the screw D the frame and bars will slide on the tilting frame.

B is a forwardly-opening box secured to the lower front part of the tilting frame and seat.

O O are the side bars of the seat-frame, connected at their rear ends by the cross-bar B 0 O are eyes on the side and front crossbars of the seat-frame.

C, is a rear cross-bar of the seat-frame.

C is an intermediate cross-bar of the seatframe, and G is the front cross-bar of the same. The side bars 0 G are channel'bars, and the links and B are pivoted to the outer and inner flanges, so as to fold into the channel.

E E and E E are the bars which form the seat.

E and E are pivoted bars, which support the seat from a frame which slides on the seat-frame as the sliding frame just described slides on the tilting frame. E is such sliding frame, and E is the screw which moves it.

F F, F F and F F are the pieces which form the back. lhey are composed of flat metal strips, and the top and bottom ones are bent at the ends and secured so as to open in opposite directions. 7

At the lower end of the back and on each side thereof is an arc-shaped piece F secured thereto and having the holes F F is a lug on the inside of the arc-shaped piece at its forward point, adapted to engage the under side of bar C when. the back is reclining, so as to support the back on opposite sides of the pivot. At the point F the back is pivoted in front of the rear cross-piece of the seat-frame.

F is a cross-rod in the top and on the rear side of the back and is designed to support a head-rest.

The back-locking device is composed of the laterally-reciprocating rods G G, kept laterally extended by the en circlin spiral springs G G and supported on the rear cross-piece C of the seat-frame by the brackets G". A lever-arm G, pivoted on the brackets (J and adapted to engage the rods G G, serves to retract them when desired. In their normal positions these rods pass through holes in the side bars of the seat-frame and project through the apertures in the arc shaped piece F H H are rods bent into hooks at the ends and passed through eyes on the elbow-levers H H. 11 H are the points at which these elbow-levers are pivoted to the cross-piece A This cross-piece is turned up at the ends and bolted to the frame, and in the middle it is provided with the supporting-plates H H, through eyes in the ends of which pass the rods H H. Encircling these rods are spiral springs H H which keep them normally protruding at the sides where they pass through apertures in the. frame and into the holes B B thus locking the tilting frame in position. The rod 11 passes through eyes in the cross-pieces A A and is attached to the free ends of the elbow-levers. It is kept normally elevated by the encircling spiral spring 11, and is attached to the swinging crosslever H, provided with the protruding footpieces H H By pressing on either of these the lever and rod are drawn down and the elbow-levers moved so as to retract the locking-rods and free the tilting frame.

J is a foot-rest; J, a standard pivoted to the outer edge thereof and designed to sup port it when in position, and J 2 J 2 are lugs thereon, which can be inserted in the eyes 0 C 0' when the foot-rest is to be applied in front or at the side of the seat.

The stirrup or foot and leg rest is composed as follows: The elbow K is provided with the lower rounded part K, which is received into the socket K where it is free to turn. K is a second elbow, at the upper end of which is placed the stirrup proper K At the point K the two elbows are pivoted together. A ratchet-bar K is pivoted to the outer end of the elbow K and adapted to engage the lug K on the elbow K, so as to hold the elbow K in any desired position. K is a slidingbar, which carries a stirrup K and is adapted to be locked in any position by the nut and bolt K K and K are areshaped pieces, one smaller than the other, both pivoted together, one within the other, at their upper ends, so as to form a cradlestirrup K K is centrally pivoted to the bar which supports it, so as to permit of its being turned about.

The use and operation of my invention are as follows: The rod on the rear upper edge of the back is designed to hold a movable head-rest. The rod F", which passes along the upper part of the back, is indicated in Fig. 2. Any kind of a head-rest-as, for instance, one having eyes with set-screwscould be used; but such head-rests are no part of my invention. The rest can be secured by set-screws. The back, being constructed of light metal, can be light and strong. The top cross-piece comes flush with the front surface and the bottom with the rear surface, thus giving the back an easy curve. By moving the lever G the rods G G are drawn out of the aperture in the arc-shaped plates, and the back can then be swung in either direction to fold up on the seat for shipment or to tilt toward the rear to form a bed. In the latter position the lower end of the back rests on the seat-frame and the lugs on the perforated plates engage the side bars on the seatframe in front of the pivot, thus giving the back a strong support. The motion .of the screws D or serves to move the sliding frames backward or forward, as the case may be, thus extending or contracting the parallel bars and raising or lowering the seat or seatframe. liy pressing on the foot-pieces H H by the foot on either side the elbow-levers H are moved and the transverse rods retracted, so as to loosen the tilting frame and permit the same to be inclined in either direction. The foot-rest can be applied at the front for the feet or at the sidewhen the seat-frame is elevated and the occupant is lying on one side. \V hen the seat-frame retreats in its upward movement, it uncovers the box B, and the same can then be used for a step to enable one to reach the elevated seat. When the seat-frame is down, the fringe on the cushion covers the front of the receptacle and it can be used to hold tools and the foot-rest. The stirrup is set in the socket K and the upper knee-cradle is supported in suitable position by the ratchet and lug. The footcradle is supported by the nut. The kneecradle can be thrown forward so as to serve as a foot-cradle, if desired.

I am aware of German Patent No. 22,145, and United States, Shoeninger, of August 4, 1874, No. 153,684, swings; also United States patent to Vorse, June 28, 1870, No. 104,906, school furniture, and it is not my purpose to claim any of the things in such patent-s described.

I claim- 1. In an adjustable chair, the combination of the back, formed as shown, and provided at its lower extremity with perforated areshaped pieces rigidly secured to the side pieces of the back, with the seat-frame having a rear ci'osspiece, the are pieces provided with lugs at their lower extremities and the IIO back pivoted on the seat-frame concentric with its arc-shaped pieces at a point somewhat forward of the rear cross-bar of the seatframe, and spring-bars normally extended through the perforations in the arc-shaped pieces, but adapted to be retracted so that when the back reclines it is supported on the rear cross-pieces of the seat-frame and also by means of the lugs 011 the side bars of the seat-frame, and so that it may be locked in any convenient position.

2. In an adjustable chair, a back composed of strips of metal, the upper and lower crosspieces being bent at the ends, secured to the side pieces, and turned so that the upper is flush with the front and the lower with the rear of the back.

3. In an adjustable chair, a frame, in combination with an adjustable seat-frame and a receptacle which is covered when the seatframe is down and when the seat-frame is raised is exposed and can be used'for a step.

4:. In an adjustable chair, the combination of a stirrup, an elbow-lever pivoted at its angle to the standard on the chair'and attached at one end to the stirrup, a ratchet-bar pivoted to the other end of the lever, and a log on the standard which engages the ratchetbar and thus adj ustab] y holds the stirrup.

5. In an adjustable chair, a compound stirrup consisting of a knee-cradle, supported as shown, and a foot-stirrup adjustably sup ported by a set-nut, both stirrups being sup ported on a standard pivoted on the seatframe.

6. In an adjustable chair, the combination of a tilting seat-supporting frame with a chairframe, the former suspended from the latter by three hangers on each side, the central hanger being Vertical, the side hangers inclining, as shown, and all three pivoted to both frames.

7. In an adjustable chair, the combination of a tilting seat-supporting frame, a seatframe proper, a grooved bar secured tothe tilting frame, slide -bars moving in such groove and secured to a frame, and extension-bars pivoted at their lower ends, respectively, t0 the grooved bar and the slide-bar and at their upper ends to the side bar of the seat-frame, as shown, so that by moving the frame to which the slide-bars are attached the seat-frame may be elevated or lowered.

EDWIN PYNCI'ION. 

